You can try to reinstall the wireless driver from the following link.http://dell.to/SkxC8z

I am sending you a friend request; please accept it and send me the Service Tag through private message. Please do not share the Service tag in the open forum. If you still face issues, I can check your system details and help you with the right driver.

Please check in the device manager if the wireless driver is installed. Mentioned below are the steps to check in Device Manager.

my OS is Windows XP Prof. I tried to install the driver under the link above, but it is not working cause it is for Windows 7.

Afterwards I tried to create a Service Tag, but failed. Recived a failure message told me that the dellsystemdetect.application couldn't be installed because it needs WindowsBase Version 3.0.0.0. By the way I didn't receive a friendsip request from you.

Then I checked Device Manager as you proposed it. See the screenshot below.

I do still having problems getting access to the internet via wifi and also via LAN.

The driver installation link I provided to you was compatible with Windows XP and Vista operating systems. However, as I am not sure about the wireless card in your system it may not be the right one.

I have also sent you a friend request, to accept the request please go to your profile page and click on the 'Friends' tab. You should be able to see my message. On that same page you can click on 'start a conversation' and send me the service tag for your system on a private message. You will be able to find the service tag on a white bar coded sticker on the bottom of the laptop. Once I get the service tag I can check the system configuration and help you out with the right driver.

Unfortunately, I do not see the screenshot of device manager. You can click on 'Use rich formatting' and click on the insert picture tab on the top bar to insert the picture of the device manager.

I would also advise you to go to the link below, choose the operating system and you will be able to find all the drivers required for your system.http://dell.to/SkxC8z

I checked the picture of the device manager, the wireless driver is already installed. You will need to install the ethernet driver for the LAN connection, modem drivers and the driver from the card reader.

Every system has an unique service tag from the time it is manufactured. There is no way to generate one. You can look for the service tag either at the bottom of the laptop on a white bar coded sticker. It is alphanumeric and consists of 7 digits. If the sticker is missing or faded you can also check the service tag by going into the system BIOS.

To enter the BIOS, restart the system and tap on the F2 key on the Dell logo. On the system setup screen you will be able to find the service tag.

The drivers provided to you by Dell_Abhishek_B are correct. Please install the drivers provided through the private message and let me know the results. As far as the wireless driver is concerned, 'Device Manager' does not show any issue with the same. Are you facing any wireless issue on your system? Also, if you are not getting sound from your system, install the sound driver from the link: http://dell.to/Rq72Zp